#ifndef __M_DB_H__
#define __M_DB_H__
#include <mutex>
#include <assert.h>
#include "util.hpp"

class user_table
{
private:
    MYSQL *_mysql;     // mysql操作句柄
    std::mutex _mutex; // 互斥锁保护数据库的访问操作

public:
    user_table(const std::string &host, const std::string &username, const std::string &password, const std::string &dbname, uint16_t port = 3306)
    {
        _mysql = mysql_util::mysql_create(host, username, password, dbname, port);
        assert(_mysql != NULL);
    }
    ~user_table()
    {
        mysql_util::mysql_destroy(_mysql);
        _mysql = NULL;
    }

    // 注册时新增用户
    bool insert(Json::Value &user)
    {
#define INSERT_USER "insert user values(null, '%s', password('%s'), 1000, 0, 0);"
        if (user["username"].isNull() || user["password"].isNull())
        {
            DLOG("check username or password.");
            return false;
        }
        char sql[4096] = {0};
        sprintf(sql, INSERT_USER, user["username"].asCString(), user["password"].asCString());
        bool ret = mysql_util::mysql_exec(_mysql, sql);
        if (ret == false)
        {
            DLOG("failed to add user information.");
            return false;
        }
        return true;
    }

    // 登陆验证并返回详细的用户信息
    bool login(Json::Value &user)
    {
#define LOGIN_USER "select id, score, total_count, win_count from user where username='%s' and password=password('%s');"
        if (user["username"].isNull() || user["password"].isNull())
        {
            DLOG("check username or password.");
            return false;
        }
        char sql[4096] = {0};
        sprintf(sql, LOGIN_USER, user["username"].asCString(), user["password"].asCString());
        MYSQL_RES *res = NULL;
        {
            std::unique_lock<std::mutex> lock(_mutex);
            bool ret = mysql_util::mysql_exec(_mysql, sql);
            if (ret == false)
            {
                DLOG("user login failed.");
                return false;
            }
            res = mysql_store_result(_mysql);
            if (res == NULL)
            {
                DLOG("no user login info");
                return false;
            }
        }
        int row_num = mysql_num_rows(res);
        if (row_num != 1)
        {
            DLOG("user info is not unique");
            return false;
        }
        MYSQL_ROW row = mysql_fetch_row(res);
        user["id"] = (Json::UInt64)std::stol(row[0]);
        user["score"] = (Json::UInt64)std::stol(row[1]);
        user["total_count"] = (Json::UInt64)std::stol(row[2]);
        user["win_count"] = (Json::UInt64)std::stol(row[3]);
        mysql_free_result(res);
        return true;
    }

    // 通过用户名获取用户信息
    bool select_by_name(const std::string &name, Json::Value &user)
    {
#define USER_BY_NAME "select id, score, total_count, win_count from user where username='%s';"
        char sql[4096] = {0};
        sprintf(sql, USER_BY_NAME, name.c_str());
        MYSQL_RES *res = NULL;
        {
            std::unique_lock<std::mutex> lock(_mutex);
            bool ret = mysql_util::mysql_exec(_mysql, sql);
            if (ret == false)
            {
                DLOG("get user by name failed.");
                return false;
            }
            res = mysql_store_result(_mysql);
            if (res == NULL)
            {
                DLOG("no user info");
                return false;
            }
        }
        int row_num = mysql_num_rows(res);
        if (row_num != 1)
        {
            DLOG("user info is not unique");
            return false;
        }
        MYSQL_ROW row = mysql_fetch_row(res);
        user["id"] = (Json::UInt64)std::stol(row[0]);
        user["name"] = name;
        user["score"] = (Json::UInt64)std::stol(row[1]);
        user["total_count"] = (Json::UInt64)std::stol(row[2]);
        user["win_count"] = (Json::UInt64)std::stol(row[3]);
        mysql_free_result(res);
        return true;
    }

    // 通过id获取用户信息
    bool select_by_id(uint64_t id, Json::Value &user)
    {
#define USER_BY_ID "select username, score, total_count, win_count from user where id=%d;"
        char sql[4096] = {0};
        sprintf(sql, USER_BY_ID, id);
        MYSQL_RES *res = NULL;
        {
            std::unique_lock<std::mutex> lock(_mutex);
            bool ret = mysql_util::mysql_exec(_mysql, sql);
            if (ret == false)
            {
                DLOG("get user by id failed.");
                return false;
            }
            res = mysql_store_result(_mysql);
            if (res == NULL)
            {
                DLOG("no user info");
                return false;
            }
        }
        int row_num = mysql_num_rows(res);
        if (row_num != 1)
        {
            DLOG("user info is not unique");
            return false;
        }
        MYSQL_ROW row = mysql_fetch_row(res);
        user["id"] = (Json::UInt64)id;
        user["name"] = row[0];
        user["score"] = (Json::UInt64)std::stol(row[1]);
        user["total_count"] = (Json::UInt64)std::stol(row[2]);
        user["win_count"] = (Json::UInt64)std::stol(row[3]);
        mysql_free_result(res);
        return true;
    }

    // 胜利时天梯分数增加30，战斗场次增加1，胜利场次增加1
    bool win(uint64_t id)
    {
#define USER_WIN "update user set score=score+30, total_count=total_count+1, win_count=win_count+1 where id=%d"
        char sql[4096] = {0};
        sprintf(sql, USER_WIN, id);
        bool ret = mysql_util::mysql_exec(_mysql, sql);
        if (ret == false)
        {
            DLOG("failed to update vector info.");
            return false;
        }
        return true;
    }

    // 失败时天梯分数减少30，战斗场次增加，其他不变
    bool lose(uint64_t id)
    {
#define USER_LOSE "update user set score=score-30, total_count=total_count+1 where id=%d"
        char sql[4096] = {0};
        sprintf(sql, USER_LOSE, id);
        bool ret = mysql_util::mysql_exec(_mysql, sql);
        if (ret == false)
        {
            DLOG("failed to update loser info.");
            return false;
        }
        return true;
    }
};
#endif